WordPress offers a range of Widgets by default to include in sidebars. These include Image, Gallery, Recent Posts, Recent Comments, Archives, Text and many others. If you have ever developed a WordPress Theme, you would be familiar with the concept of Custom Widgets. These are widgets specific to a Theme. I would not go in the details about creating a custom widgets as I'm assuming you already know that if you are reading this article. In this article, we'll be creating a Range Slider Control for a Custom WordPress Widget. I'll be creating the default slider but each one of them is possible.